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Regulation of transepithelial ion transport in the rat late distal colon by the sympathetic nervous system
X. Zhang, Y. Li, X. Zhang, Z. Duan, J. Zhu
Jazyk angličtina Země Česko
Typ dokumentu časopisecké články, práce podpořená grantem
NLK
Directory of Open Access Journals
od 1991
Free Medical Journals
od 1998
ProQuest Central
od 2005-01-01
Medline Complete (EBSCOhost)
od 2006-01-01
Nursing & Allied Health Database (ProQuest)
od 2005-01-01
Health & Medicine (ProQuest)
od 2005-01-01
ROAD: Directory of Open Access Scholarly Resources
od 1998
- MeSH
- beta-2-adrenergní receptory genetika metabolismus MeSH
- časové faktory MeSH
- epitelové buňky metabolismus MeSH
- inhibitory vychytávání adrenergních neurotransmiterů farmakologie MeSH
- iontový transport MeSH
- kolon inervace metabolismus MeSH
- membránové potenciály MeSH
- messenger RNA metabolismus MeSH
- noradrenalin metabolismus farmakologie MeSH
- potkani Sprague-Dawley MeSH
- proteiny přenášející noradrenalin přes plazmatickou membránu genetika metabolismus MeSH
- střevní sliznice inervace metabolismus MeSH
- sympatický nervový systém účinky léků fyziologie MeSH
- sympatomimetika farmakologie MeSH
- techniky in vitro MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The colorectum (late distal colon) is innervated by the sympathetic nervous system, and many colorectal diseases are related to disorders of the sympathetic nervous system. The sympathetic regulation of colorectal ion transport is rarely reported. The present study aims to investigate the effect of norepinephrine (NE) in the normal and catecholamine-depleted condition to clarify the regulation of the sympathetic adrenergic system in ion transport in the rat colorectum. NE-induced ion transport in the rats colorectum was measured by short-circuit current (I(sc)) recording; the expression of beta-adrenoceptors and NE transporter (NET) were quantified by real-time PCR, and western blotting. When the endogenous catecholamine was depleted by reserpine, the baseline I(sc) in the colorectum was increased significantly comparing to controls. NE evoked downward deltaI(sc) in colorectum of treated rats was 1.8-fold of controls. The expression of beta(2)-adrenoceptor protein in the colorectal mucosa was greater than the control, though the mRNA level was reduced. However, NET expression was significantly lower in catecholamine-depleted rats compared to the controls. In conclusion, the sympathetic nervous system plays an important role in regulating basal ion transport in the colorectum. Disorders of sympathetic neurotransmitters result in abnormal ion transport, beta-adrenoceptor and NET are involved in the process.
Artificial Liver Center Beijing Youan Hospital Capital Medical University Beijing China
Department of Immunology School of Basic Medical Sciences Capital Medical University Beijing China
Citace poskytuje Crossref.org
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- $a The colorectum (late distal colon) is innervated by the sympathetic nervous system, and many colorectal diseases are related to disorders of the sympathetic nervous system. The sympathetic regulation of colorectal ion transport is rarely reported. The present study aims to investigate the effect of norepinephrine (NE) in the normal and catecholamine-depleted condition to clarify the regulation of the sympathetic adrenergic system in ion transport in the rat colorectum. NE-induced ion transport in the rats colorectum was measured by short-circuit current (I(sc)) recording; the expression of beta-adrenoceptors and NE transporter (NET) were quantified by real-time PCR, and western blotting. When the endogenous catecholamine was depleted by reserpine, the baseline I(sc) in the colorectum was increased significantly comparing to controls. NE evoked downward deltaI(sc) in colorectum of treated rats was 1.8-fold of controls. The expression of beta(2)-adrenoceptor protein in the colorectal mucosa was greater than the control, though the mRNA level was reduced. However, NET expression was significantly lower in catecholamine-depleted rats compared to the controls. In conclusion, the sympathetic nervous system plays an important role in regulating basal ion transport in the colorectum. Disorders of sympathetic neurotransmitters result in abnormal ion transport, beta-adrenoceptor and NET are involved in the process.
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